body,html{
  line-height: 1;
  font-weight: 200;
  font-family: 'PingFang SC','STHeitiSC-Light',arial;
}
.clearfix {
  display: inline-block;
  &::after{
    display: block;
    content: ".";
    height: 0;
    line-height: 0;
    clear: both;
    visibility: hidden;
  }
}
@media (-webkit-min-device-pixel-ratio:1.5),(min-device-picel-ratio:1.5){
  .border-1px{
    &::after{
      -webkit-transform: scaleY(0.7);
      transform: scaleY(0.7);
    }
  }
}
@media (-webkit-min-device-pixel-ratio:2),
(min-device-picel-ratio:2) {
  .border-1px {
    &::after {
      -webkit-transform: scaleY(0.5);
      transform: scaleY(0.5);
    }
  }
}
